virtualx-engine/scene/3d/light.h

/*************************************************************************/
/*  light.h                                                              */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
/*                    http://www.godotengine.org                         */
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/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur.                 */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
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/*************************************************************************/
#ifndef LIGHT_H
#define LIGHT_H


#include "scene/3d/visual_instance.h"
#include "scene/resources/texture.h"
#include "servers/visual_server.h"

/**
	@author Juan Linietsky <reduzio@gmail.com>
*/
class Light : public VisualInstance {

	OBJ_TYPE( Light, VisualInstance );
	OBJ_CATEGORY("3D Light Nodes");

public:
	
	enum Parameter {
		PARAM_RADIUS=VisualServer::LIGHT_PARAM_RADIUS,
		PARAM_ENERGY=VisualServer::LIGHT_PARAM_ENERGY,
		PARAM_ATTENUATION=VisualServer::LIGHT_PARAM_ATTENUATION,
		PARAM_SPOT_ANGLE=VisualServer::LIGHT_PARAM_SPOT_ANGLE,
		PARAM_SPOT_ATTENUATION=VisualServer::LIGHT_PARAM_ATTENUATION,
		PARAM_SHADOW_DARKENING=VisualServer::LIGHT_PARAM_SHADOW_DARKENING,
		PARAM_SHADOW_Z_OFFSET=VisualServer::LIGHT_PARAM_SHADOW_Z_OFFSET,
		PARAM_SHADOW_Z_SLOPE_SCALE=VisualServer::LIGHT_PARAM_SHADOW_Z_SLOPE_SCALE,
		PARAM_MAX=VisualServer::LIGHT_PARAM_MAX
	};
	
	
	enum LightColor {
	
		COLOR_AMBIENT=VisualServer::LIGHT_COLOR_AMBIENT,
		COLOR_DIFFUSE=VisualServer::LIGHT_COLOR_DIFFUSE,
		COLOR_SPECULAR=VisualServer::LIGHT_COLOR_SPECULAR
	};


	enum Operator {

		OPERATOR_ADD,
		OPERATOR_SUB
	};
private:
	
	
	Ref<Texture> projector;
	float vars[PARAM_MAX];
	Color colors[3];
	
	
	VisualServer::LightType type;
	bool shadows;
	Operator op;
	
// bind helpers

protected:	

	RID light;

	virtual bool _can_gizmo_scale() const;
	virtual RES _get_gizmo_geometry() const;
	
	static void _bind_methods();

	
	Light(VisualServer::LightType p_type);	
public:

	VS::LightType get_light_type() const { return type; }

	void set_parameter(Parameter p_var, float p_value);
	float get_parameter(Parameter p_var) const;

	void set_color(LightColor p_color,const Color& p_value);
	Color get_color(LightColor p_color) const;

	void set_project_shadows(bool p_enabled);
	bool has_project_shadows() const;

	void set_projector(const Ref<Texture>& p_projector);
	Ref<Texture> get_projector() const;

	void set_operator(Operator p_op);
	Operator get_operator() const;

	virtual AABB get_aabb() const;
	virtual DVector<Face3> get_faces(uint32_t p_usage_flags) const;

	void approximate_opengl_attenuation(float p_constant, float p_linear, float p_quadratic, float p_radius_treshold=0.5);

	Light();
	~Light();

};

VARIANT_ENUM_CAST( Light::Parameter );
VARIANT_ENUM_CAST( Light::LightColor );
VARIANT_ENUM_CAST( Light::Operator );


class DirectionalLight : public Light {

	OBJ_TYPE( DirectionalLight, Light );

public:

	enum ShadowMode {
		SHADOW_ORTHOGONAL,
		SHADOW_PERSPECTIVE,
		SHADOW_PARALLEL_2_SPLITS,
		SHADOW_PARALLEL_4_SPLITS
	};
	enum ShadowParam {
		SHADOW_PARAM_MAX_DISTANCE,
		SHADOW_PARAM_PSSM_SPLIT_WEIGHT,
		SHADOW_PARAM_PSSM_ZOFFSET_SCALE
	};

private:
	ShadowMode shadow_mode;
	float shadow_param[3];
protected:
	static void _bind_methods();
public:

	void set_shadow_mode(ShadowMode p_mode);
	ShadowMode get_shadow_mode() const;

	void set_shadow_max_distance(float p_distance);
	float get_shadow_max_distance() const;
	void set_shadow_param(ShadowParam p_param, float p_value);
	float get_shadow_param(ShadowParam p_param) const;

	DirectionalLight();
};

VARIANT_ENUM_CAST( DirectionalLight::ShadowMode );
VARIANT_ENUM_CAST( DirectionalLight::ShadowParam );


class OmniLight : public Light {

	OBJ_TYPE( OmniLight, Light );
protected:
	static void _bind_methods();

public:


	OmniLight() : Light( VisualServer::LIGHT_OMNI ) {}
};

class SpotLight : public Light {

	OBJ_TYPE( SpotLight, Light );
protected:
	static void _bind_methods();
public:


	SpotLight() : Light( VisualServer::LIGHT_SPOT ) {}
};


#endif